A list cannot use appendleft but a can. collection

deque

string

sequence

Windows defender is an antispyware software.it does not work effectively if any other antispyware is added.

By default, powerpoint opens in normal view, displaying the thumbnails, notes and slide view. if you prefer, however, you can specify that powerpoint open in a different view, such as slide sorter view, slide show view, notes page view, and variations on normal view.

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